71678138279445 has 24 divisors (see below), whose sum is σ = 130781164581600. Its totient is φ = 36216322498656.

The previous prime is 71678138279413. The next prime is 71678138279467. The reversal of 71678138279445 is 54497283187617.

It is a happy number.

71678138279445 is a `hidden beast` number, since 7 + 1 + 6 + 7 + 81 + 38 + 2 + 79 + 445 = 666.

It is not a de Polignac number, because 71678138279445 - 2⁵ = 71678138279413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41917039075 + ... + 41917040784.

It is an arithmetic number, because the mean of its divisors is an integer number (5449215190900).

Almost surely, 2^{71678138279445} is an apocalyptic number.

It is an amenable number.

71678138279445 is a deficient number, since it is larger than the sum of its proper divisors (59103026302155).

71678138279445 is a wasteful number, since it uses less digits than its factorization.

71678138279445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83834079889 (or 83834079886 counting only the distinct ones).

The product of its digits is 568995840, while the sum is 72.

The spelling of 71678138279445 in words is "seventy-one trillion, six hundred seventy-eight billion, one hundred thirty-eight million, two hundred seventy-nine thousand, four hundred forty-five".